noun
coming-of-age ceremony
Refers to the formal ceremony celebrating a person's transition to adulthood. In modern Japan, this is typically the 成人式 (seijin-shiki) held on Coming of Age Day.
来月、成年式に参加する予定です。
I plan to attend the coming-of-age ceremony next month.
More common modern term for the Japanese coming-of-age ceremony. 成年式 is a synonym but less frequently used.
Compound of 成年 (seinen, 'adulthood') and 式 (shiki, 'ceremony').